Machine for working the heel-seat of shoes, boots, and the like



Jan. 12, 1932. M. GRUNE 1,840,444

MACHINE FOR WORKING THE HEEL SEAT SHOES, BOOTS, AND THE LIKE Filed Oct. 23, 1930 2 Sheets-Sheet 1 2 4 r, 26' a? O 2 s. mvsmow i 29 //&/\ rwn Jan. 12, 1932. M. GRUNE 1,840,444

MACHINE FOR WORKING THE HEEL SEAT OF SHOES, BOOTS, AND THE LIKE Filed Oct. 23, 1930 2 Sheets-Sheet 2 lugs.

INVENTOR:

Patented Jan. 12, 1932 UNET-ED STATES PATENT OFFICE MAX GRUNE, OF PIRMASENS,-GERMANY MACHINE FOR WORKING THE HEEL-SEAT 0F SHOES, BOOTS, AND THE LIKE Application filed October 23, 1930, Serial No. 490,743,'and in Germany November 19, 1929.

In the manufacture of boots and shoes and the like, especially boots etc. having wooden heels, it is customary to subject the heel end of the sole which serves as seat for the heel proper to a separate working prior to attaching the heel, the object of'that separate working being to provide the heel end of the sole with a shoulder forming an abutment face for the heel breast, as well as with a vault 1e that corresponds to the usually concaveshaped fastening surface for the heel. There exist already machines designed for these purposes and operating in this manner that the sole which is detached at its heel end from F the shoe is placed upon a moulding plate having a central aperture and is pressed down upon said plate, by means of a die or stamp, generally moved by a treadle, insuch a manner that the middle part of the heel end of 29 the sole projects over the lower rim of the said moulding plate. Thereafter the leather is cut off at the lower side of this plate by means of a knife moved horizontally by a manually operated lever, so that a U-shaped 5' waste strip is produced; now another knife which is guided vertically or nearly vertically and is actuated by another manually moved lever produces said shoulder which serves as abutment face for the heel breast. It has, with respect to these known machines, already been proposed to move the horizontal knife in this way that it serves as cutting support when the vertical knife is moved so as thereby to prevent this latter knife from penetrating into the shoe etc. to which the sole is attached. As, however, the knives mentioned are moved manually and independently from one another there is no certainty or reliability that the vertical knife is not moved downwardly ust at that time at which the horizontal cutting knife is not yet in its front end position in which case the cutting surface will be irregular and damage will unavoidably be done to the shoe etc. 45 The chief object of the present invention is to obviate the just-stated drawback, and the object in view is attained by controlling the movement of the horizontal cutting knife by a common drive for both knives positively in such a manner that said knife serves with certainty as cutting support for the vertical knife. The standstill of the horizontal knife at the end of its cutting stroke, as is necessary for the object in view, is effected preferably with the aid of a slotted guide member forming part of the driving rods, and the vertical knife is moved preferably by a member adapted to be subjected to tension,-as for instance a spring-so that it is prevented from knocking down powerfully upon the horizontal knife and damaging it.

The invention is illustrated diagrammatically and by way of example on the accompanying drawings on which Figure l is a sideview of the arrangement and combination of parts, partly in section, required for carrying out the invention;

Figure 2 is a similar view showing certain parts in-another position;

Figure 3 is a vertical section through the two knives, the stamp or die, and some-adjacent parts, together with a side-view of the last and the sole thereon;

Figure 4 is a bottom-view of the bipartite die or pressing stamp;

Figure 5 is a plan-of the moulding plate;

Figure 6 is a side-view of three heel ends of the sole in worked state, the figures differing as regards the position or obliquity of the abutment face (S) for the heel breast;

and

Figure 7 is a perspective illustration of the heel part of a shoe after the heel seat has beenworked, this figure being drawn to a greatly reduced scale.

1, Fig. 1, denotes a standard or the like carrying the various operating parts. 2 (Figs. 1-3 and is the moulding plate which is recessed at 3 (Fig. 5); this recess is U- shaped and the edge inside the U is oblique so that it forms an inclined surface or rim 4. The plate '2 is supported by a bracket 5, (Figs. 1 and 2) the upper portion of which is designed as a guide for the pressing stamp 6, the object of which is to press the heel end of the sole (after it has been placed upon the recessed part of the plate 2) upon and .into this plate in such a manner that the middle portion of the heel end of the sole projects over the lower rim of said plate.

The stamp consists of the parts 6 and 7, of which 6 is guided in the bracket 5, and 7 is laterally enlarged and so shaped that it fits to and into the recessed part of the plate 2, also as regards the obliquity of the rim d, as appears from Figs. 1 and 2. The parts l and 7 are, thus, those that chiefly effect the moulding of the heel end of the sole.

The stamp 67 is operated by a doublearmed lever 10 supported upon a spindle 9 and contacting at one end with the top sur face of the stamp part 6 and being connected at its other end with a rod 11 which may be moved manually or by means of a treadle or, perhaps, mechanically. When the rod 11 is moved upwardly, first both parts of the two-parted stamp, viz. the guided part 6 and the plate 7, are depressed by the intermediary of the lever 10. The stamp part 6 is, however, movable relatively to the stamp part or pressing or moulding plate 7 and tween these two parts is inserted a helical compression spring 8 (Figs. 1 and 2) which permits further downward movement of the stamp part 6 when the moulding plate 7 has come into contact with the oblique rim 4 of the plate 2. The stamp parts are then in the position shown in Fig. 2. Supposing the heel part of arsole is located between the members in question, as in Fig. 3, the leather portions lying between the oblique faces'of the members 2 and 7 will be clamped fast therebetween with apower corresponding to the strength of the now compressed spring 8, but the inner portion of the heel end of the sole is subjected to the stronger pressure exerted by the members 11, 10 and 6 and that sole portion is, therefore, pressed into and through the recess'3 (Fig. 5) to such an extent that its bottom surface projects beyond the bottom surface of the member 3 (Fig. While, the stamp member is so far depressed, the tension of the spring 8 is correspondingly increased so that the rim of the sole which is located upon the oblique U-shaped r-im at is pressed thereon with a corresponding power.

Upon the top surface of the guide part of the bracket 5 is an adjustable screw 12 which constitutes an abutment member for the lever 10 so that the downward movement of the righthand arm of this lever is limited by said screw. As the screw 12 is adjustable it is possible to regulate or adjust the downward stroke of the stamp member 6.

In Figs. 1 and 2 the various parts are visible from their left side; the frontal side is that at the righthand end of these figures. In front of the bracket 5 or, more precisely, in front of the guide-part of the same, a guide member 13 for the vertically movable knife 14 is affixed to said guide part. The upper end of this knife is connected by a link 15 with one arm of a double-armed lever 17 which is supported on a pivot 16 and at its other end provided with a roll 18 subjected to the action of a cam disk 21 secured to a shaft 20 which is rotated by any desired means. Also an eccentric 22 is affixed to this shaft; the annulus of this eccentric is connected with a practically vertical double armed lever 2% which is supported upon a pivot 23 and is jointed at its lower end to the horizontal knife 29 which is located below the plate 2; this knife and the lever 2% are connected with one another by a rod 27 and a link 25 which is provided with an eye 28 engaged by a pin 26 so that dead play is provided bet-ween the lever 24 and the knife 29.

Upon the plate 3 is located a push-bar 30 which is guided in the foot of the bracket 5 and can be shifted by means of a bell-crank lever 32 and a; rod 33. When this rod is moved downwardly, the push-bar 30 is shifted to the right (in Fig. 1) or, which is the same, in the direction to the front of the .machine.

The manner of operation of the arrangement and combination of parts described on the preceding pages is as follows:

W hen the heel end of the sole has been clamped fast upon the recessed plate 23- l by the stamp 6? so that the foot of the stamp is located the recess 3, as in Fig. 2 (in which the sole has been omitted), the machine or, more precisely, the shaft 20 is thrown into gear whereby first the knife 29 is moved forwardly, that is to say, in the direction to the recess 3, and while being moved along below this recess it cuts into the leather which projects below the bottom surface of the plate 2 (Fig. 3). The breadth of the knife corresponds to the width of the recess 3, and there are thus formed at the reel end of the sole a tongue-shaped leather part and a horse-shoe shaped leather part which both are integral with the other or main part of the sole.

When this phase has been performed, and the ever 24 swings back to its former position, the knife 29 does not immediately take part in that rearward movement but remains in its position for a certain short period of time viz. as long as the eye 28 requires to contact again at the righthand end of its slot with the pin 26; only then the eye draws the knife with it. l Jhile the knife 29 is, thus, stationary during that short period of time, the vertical knife Ll is moved downwardly under the action of a helical tensile spring 19 which had been kept under tension as long as the knife 14 was in'its lifted position, in that the lever 17 was held in the positio-n shown in Fig. 1 by the cam disk 21. But when this disk has so much been turned that the roll '18 can. rise, the spring 19 becomes active and moves the knife 14: downwardly bythe intermediary of the members 17 and 15. The position of the two knives the machine frame.

relatively to one another is then that shown in Fig. 2. The strength oflthe spring 19 is such that the knife 14 can enter into, and pass through, the leather, and the shape of the cutting edge of the knife 14 is such that it cuts off the horse-shoe shaped leather part. The knife 29 which is during this phase located below the sole forms, therefore, a support for it, and this being so, the knife 14 can perform its operation in the desired manner, the leather cannot give way and there being also obtained a smooth cutting edge at the places where the horse-shoe. shaped rim had hung together with the body of the sole.

The downward movement of the knife 14 is accurately determined and limited by the cam disk 21, the shape of which is such that the edge of said knife just touches slightly the knife 29 without any pressure thereon so that the cutting edge of the knife 14 is not in the least damaged. When the cutting'operation has been finished, the lever 17 is again turned by the cam disk 21, it re-assumes the position shown in Fig. 1, and the spring 19 is again expanded. The heel portion of the sole, i. e. the heel seat of the same, is now finished, and the sole can be withdrawn from the machine. The horse-shoe shape waste strip which had still been retained between the stamp 6 and the stamp part '7 is freed, in that the stamp is lifted by the members 10 and 11, and immediately thereafter the strip is thrown out of the machine by the push bar 30, in that now the rod 33 is drawn downwards manually as by means of a treadle.

The front edge of the plate 2 does not extend to the vertical plane in which the knife 14 reciprocates; the sole, prior to being worked in the machine, need be disconnected from the respective shoe or boot etc. only so much as is required by said vertical plane, i. e. by the cutting plane of the vertical knife, so that no other part of the sole must be again fixed in place upon the shoe etc.

As the knife 14 produces also the abutment edges for the heel breast the guide member 13 is preferably so designed that the angle between the cutting face of said knife and the sole which, with the constructional form of the machine, as shown and described, amounts to approximately can be varied so that the abutment edges or shoulders can also have an oblique position, as indicated at S in Fig. 6 in which. besides the vertical shoulder, two different oblique shoulders or abutment edges are shown.

In order to render possible to place the heel end of the sole to be worked conveniently and in proper position upon the plate 2 a ball-holding member 35 is provided at the front of the frame of the machine, said member being formed by a screw 35 that is adjustable in an arm 34 projecting forth from The downwardly directed head of said screw constitutes an abutment for the sole of the shoe to be worked, and its adjustment is effected in accordance with the shape and size of that shoe etc.

I wish it to be understood that I do not; limit myself to the constructional form of the machine and to the details thereof as illustrated merely by way of example. Many departures in the details are possible without departing from the gist of the invention.

bination, a moulding plate, a pressing stamp adapted to enter into said plate and to hold the heel end of the sole of the shoe etc. fastin said plate; a horizontal and horizontally movable cutting knife adapted to cooperate with said plate and a practically vertical and vertically movable cutting knife adapted to cooperate with the first-mentioned knife in such a manner that this knife serves as a support for the sole part upon which it has acted and which is thereafter to be acted on by said second knife; a common drive for both knives and motion-transmitting members, of which those for the vertical knife comprise also a member adapted to be subjected to tension, a member for transmitting the elastic force to said spring, and a cam disk so arranged as to be adapted to expand said elastic member while the vertical knife returns into its position of rest, substantially as set forth.

2. A machine for working the heel seat of shoes, boots and the like, comprising, in combination, a moulding plate, a pressing stamp adapted to enter into said plate and to hold the heel end of the sole of the shoe etc. fast in said plate; a horizontal and horizontally movable cutting knife adapted to co-operate with said plate and a practically vertical and --."ertically movable cutting knife adapted to cooperate with the first-mentioned knife in such a manner that this knife serves as a support for the sole part upon which it 3. A machine for Working the heel seat .of shoes, boots and the like, comprising in combination, a moulding plate, a pressing stamp adapted to enter into said plate and to hold the heel end of the sole of the shoe etc.

fast in said plate; a horizontal and horizonalignment with one another, one of the lasttally movable cutting knife adapted to comentioned members being slotted and the operate with said plate and a practically other havingapm engaging said slot.

vertical and vertically movable cutting knife adapted to cooperate with the first-menioned knife in such a manner that this knife serves as a support for the sole partnpon which it has acted and which is thereafter to be acted on by said second knife; a common drive for both knives, motion-transmitting members operating substantially as set forth, and a push bar arranged upon said moulding plate and adapted to be moved forward to the front end of the same so as to throw out the sole part out off at the heel end of the sole.

4. A machine for working the heel seat of shoes, boots and the like, comprising, in combination, a moulding plate, a pressing stamp adapted to enter into said plate and to hold the heel end of the sole of the shoe fast in said plate; a horizontal and horizontally movable cutting knife adapted to co-operate with said plate; a substantiallv vertical and vertically movable cutting knife, and a common drive for both knlves and motion transmltting members adapted to operate the knives in such a manner that the horizontal knife is moved beyond the cutting plane of the vertical knife so as to serve as a support for the latter during the cutting movement thereof.

5. A machine for working the heel seat of shoes, boots and the like, comprising, in combination, a moulding plate, a pressing stamp adapted to enter into said plate and to hold the heel end of the sole of the shoe fast in said plate; a horizontal and horizontally movable cutting knife adapted to co-operate with said plate, a substantially vertical and vertically movable cutting knife adapted to co-operate with the horizontal knife, a common drive for both knives, and motion transmitting members for the knives, the members for the horizontal knife are so designed that this knife is moved beyond the cutting plane of the vertical knife and remains stationary after it has performed its cutting work and until also the other knife has performed its cutting work.

6. A machine for working the heel seat of shoes, boots and the like, comprising in combination, a moulding plate, a pressing stamp adapted to enter into said plate and to hold the heel end of the sole of the shoe fast in said plate; a horizontal and horizontally movable cutting knife adapted to cooperate with said plate, and a substantially vertical and verticallv movablecutting knife adapted to cooperate with the horizontal knife, a common drive for said knives, and motiontransmitting members, said members for the horizontal knife being adapted to move the same beyond the cutting plane of the vertical knife and comprising also two members in In testimony whereof I affix my signature.

MAX GRUNE. 

